About the signal FRSTDATA on AD7608

Hello everyboby,

I'm going to use AD7608 in a design, and I don't understand the utility of FRSTDATA pin.

I will use serial interface to get my conversions.

I will take BUSY pin on an interrupt of my controller, and once I have an interrupt I will read registers.

Why I should need FRSTDATA pin ?

Many thanks for your help.

Best regards,